/Engine/Source/Runtime/Engine/Classes/DeviceProfiles/DeviceProfileManager.h
Gather all the cvars from the static device profile and then add all of the possible cvars+values from the dynamic/matched rule fragments.
static [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [TSet](API\Runtime\Core\Containers\TSet)< [FString](API\Runtime\Core\Containers\FString) > > GetAllReferencedDeviceProfileCVars ( [UDeviceProfile](API\Runtime\Engine\DeviceProfiles\UDeviceProfile) * DeviceProfile )